The process of magnetizing soft iron involves exposing the iron to a strong magnetic field, either through contact with a permanent magnet or by running an electric current through a coil of wire wrapped around the iron.
The purpose of magnetizing soft iron is to create a temporary magnetic field in the iron. This can be useful for a variety of applications, such as in electromagnets for lifting heavy objects or in motors and generators.
The energy required to magnetize soft iron depends on the size and shape of the iron, as well as the strength of the magnetic field or current being used. Generally, it takes more energy to magnetize larger pieces of iron or to create stronger magnetic fields.
Yes, soft iron can be demagnetized by exposing it to a strong, opposing magnetic field or by heating it above its Curie temperature (around 770°C). This causes the randomly oriented magnetic domains in the iron to lose their alignment and the iron to lose its magnetic properties.
The main factors that affect the energy required to magnetize soft iron are the size and shape of the iron, the strength of the magnetic field or current being used, and the properties of the iron itself, such as its magnetic permeability and coercivity. Other factors, such as temperature and the presence of impurities, can also affect the energy required.